Roof ventilator



Nov. 22, 1949 F. A. DAHLIN 2,489,011

l RooF VENTILATOR Filed April 23. 1946 8 Waff lo .fax o Patented Nov. 22, 1949 UNITED STATESif liFl-Cl".V

,4s9,o11 Roon "vNTIL'ro'R Freeda. Damm; fciii'ca'go; 111.- Aspirante Apr-i1 '23', 194e,lsinaeeijvs 3 caritas.'` (c1. 9s-i139' This invention relates' to'` 'ro'of ventilators.

An object of the invention is to provide a ventilator of this character, for houses, enclosures.v boats, trailers and the like', which is' 'efficient ini Operation and simple and inexpensive tol construct;

Another object of the invention is to provide a ventilator which is rain proof, spray proof and burglar proof.`

A further object of the invention is to provide a ventilator whichis adjustable from within the vehicle to vary the amount of air drawn' through the ventilator, and which has vanes for guidingv the'air drawn in.

Still another objectof-.theiinvention is to pro-" Vide a ventilator-which will 'operate eiecti'velyl regardless or the direction-off` the wind, and in' which half of the ventilator 'will always be'working.`

OtherY objects A and-advantagesio the invention' will become apparentfrom-the following description of a preferred embodiment thereof as illustratedlin the accompanying-drawings and-inlll which;

Figure 1 is a partly sectioned side elevation of my improved ventilator;

Figure 2 is a bottom plan view of the ventilator shown in Figure 1, it being removed from a supporting area, such as a roof. Figure 3 is a side elevation in part of the cylinder housing.

Referring to the drawings, it will be seen that 2 is the roof of a conveyance such as a boat or trailer. An aperture Li is formed in the roof 2, through which extends the cylinder housing 6 which has a flange 8 having holes I0 in registry with holes I2 in the margin of aperture Il in the roof through which extend bolts I4 for securing the flange 8 and hence the cylinder housing 6 to the roof 2.

The cylinder housing 6 has a top plate I6 and side walls IB threaded on their inner surface 20, thus forming a cylindrical chamber 22. Rectangular openings 24 are cut out of the upper portions of the side walls I8 as best seen in Figure 3, the openings 24 thus forming air intake apertures. A hollow cylindrical valve member or pipe 26 having outside threads 23, is threaded into the cylindrical chamber 22 as shown in Figure 1. The pipe 26 is provided with a transverse handle 3Q near its lower end by which the pipe may be rotated about its vertical axis to move it up 0r down, so that as the pipe is moved to its uppermost position shown in Figure 1 at which point it is up against the top plate IS of the cylinder housing, the air intake apertures 24 are completely covered and no air can pass through the aper-` tures. The vaivena nber'zjisthus adjustabie" downward until the airin'take apertures 26" are" completely opened, oriipward until they are' coinfrom, the radial dimensions ofthevahe assembly ured in a' recess' il@ pro'- eces's' byscrew" threads'il or other" suitable m' to" suspendingly support the' vane assembly '3,2 'below 'the platei e. The ind, andforc'e'the air down through tn 'under husin'g' chamber 22'.

A cyl'inder `hou g cap 4:2"i's` threaded onto the lower'end' 4'4' of une 'housing s.' and' has a' 'wire mesh screened, secured in itscentra'l' aperture d'8.' A 'bellow' semi "pu rde """nouslng se', proivided1 'with-' four'alr 'i ertures` being fastened to the roof 2 by means of screws or bolts 54 extending through holes in flanges et. Inside the housing 50 are four stationary vanes or legs 58 which fit close to the cylinder housing 6, making four air passageways for the wind to blow into the cylinder housing. Thus the air iiows down through the cylinder housing from whatever direction the wind may be blowing, and hence half the ventilator is always operating to conduct air. The space 60 between the inner surface of the housing y5) and the top of the cylinder housing, is lled with packing 52 of any suitable material such as rubber.

The dome housing 5B has a screw threaded interior connection with the top plate I6 peripherally of the latter, as best seen in Figure 1 of the drawing, the threads I6 of the top plate I6 being shown in Figure 2 of said drawing.

I claim:

1. A ventilator assembly for vehicles comprising a hollow, cylindrical housing having a closed end and an open end and angularly spaced apart air passage openings adjacent said closed end, said housing being mountable in an aperture in a vehicle roof with said closed end and said openings at the outer side and said open end at the inner side of the roof, internal screw threads in said housing, an externally screw threaded control sleeve threaded into said housing and movable longitudinally thereof to variably restrict said air passage openings, a dome shaped cover e center er the latter and overlying the closed end of said housing and having angularly spaced apart air passage openings therein, and vanes in said cover extending between said housing and said cover and respectively disposed between adjacent air passage openings in said housing and corresponding adjacent air passage openings in said cover, said vanes being disposed substantially in planes including the longitudinal center line of said housing to direct air from the air passage openings in said cover through corresponding air passage openings in said housing.

2. A ventilator assembly for vehicles comprising a hollow, cylindrical housing having a closed end and an open end and angularly spaced apart air passage openings adjacent said closed end,

said housing being mountable in an aperture in a vehicle roof with said closed end and said openings at the outer side and said open end at the inner side of the roof, internal screw threads in said housing, an externally screw threaded control sleeve threaded into said housing and movable longitudinally thereof to variably restrict said air passage openings, a dome shaped cover overlying the closed end of said housing and having angularly spaced apart air passage openings therein, vanes in said cover extending between said housing and said cover and respectively disposed between adjacent air passage openings in said housing and corresponding adjacent air passage openings in said cover, said vanes being disposed substantially in planes including the longitudinal center line oi said housing to direct air from the air passage openings in said cover through corresponding air passage openings in said housing, external screw threads on said housing at the open end thereof, and an internally iianged stop ring threaded onto said housing and engageable with said sleeve to preclude movement of said sleeve out of the open end of said housing.

3. A ventilator assembly for vehicles comprising a hollow, cylindrical housing having a closed end and an open end and angularly spaced apart air passage openings adjacent said closed end, said housing being mountable in an aperture in a vehicle roof with said closed end and said openings at the outer side and said open end at the inner side of the roof, internal screw threads in said housing, an externally screw threaded control sleeve threaded into said housing and movable longitudinally thereof to variably restrict said air passage openings, a dome shaped cover overlying the closed end of said housing and having angularly spaced apart air passage openings therein, vanes in said cover extending between said housing and said cover and respectively disposed between adjacent air passage openings in said housing and corresponding adjacent air passage openings in said cover, said vanes being disposed substantially in planes including the longitudinal center line of said housing to direct air from the air passage openings in said cover through corresponding air passage openings in said housing, and a handle extending diametrically of said sleeve for manual rotation of said sleeve to screw the latter longitudinally of said housing.

FRED A. DAHLIN.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 683,173 Francis Sept. 24, 1901 1,128,166 Manning Feb. 9, 1915 1,289,821 Laakso Dec. 31, 1918 1,319,526 Hauser Oct. 21, 1919 1,380,567 Knowles June 7, 1921 1,425,028 Lyon Aug. 8, 1922 1,893,272 Clay Jan. 3, 1933 FOREIGN PATENTS Number Country Date 16,654 Great Britain June 30, 1910 

